Moderate to heavy rain and out-of-season snow will cover the central corridor of the Midwest, from Minnesota and Wisconsin south to the Delta, Friday. Snow is reported in Arkansas for the first time ever in May. Flooding is again an issue in the mid-Mississippi Valley. This rain and snow will bring more wet soils and extensive delays to field work in the heart of the Corn Belt. Meanwhile, freeze warnings are again in effect in the southwestern and Southern Plains, which threaten wheat. Northern areas will see a mix, with flooding in North Dakota and the eastern Prairies and a ...